draw both enolates formed when the ketone is treated with base. include charges. draw the oxyanion species; do not draw carbanion resonance forms. the starting material is a 6 carbon ring where carbon 1 is double bonded to oxygen and carbon 2 has a methyl substituent. this forms enolate 1 and enolate 2.

Answer:  It is element nitrogen. It has an atomic number of 7 and the valence electron is 5. It needs 3 electrons to complete its octet state. That's why sometimes it has the oxidation number of -3 in ammonia.

Answer:

Please find the answer to the question below

Explanation:

In chemistry, the following mathematical formula is used to calculate the number of moles contained by a substance:

mole = mass of substance (g)/molar mass of substance (g/mol)

Molar mass of salicylic acid (C7H6O3) = 12(7) + 1(6) + 16(3)

= 84 + 6 + 48

= 138g/mol

Mass = 5.50grams

mole = 5.5/138

mole = 0.039

Approximately, the number of moles of 5.5grams of salicylic acid is 0.04moles. This is in accordance with the mole value (0.04) given in this question.

Answer:

I think the first one (not really sure) but just try hehe

The equilibrium constant of the reaction from the calculation that has been done is 0.154

The concentrations (or partial pressures) of reactants and products in chemical equilibrium for a specific chemical reaction are related by the equilibrium constant (K), a mathematical equation. It quantifies the degree to which an equilibrium has been reached in a reaction.

We have the equation of the reaction as;

A(g) + B(g) ⇔C(g)

Thus;

Keq = 45.83/11.23 * 26.50

Keq = 0.154

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According to the electron sea model, the melting points of metals are not as extreme as the boiling points. Therefore, the given statement is correct is true.

The Electron Sea Model's whole hypothesis relies around the behavior of atoms throughout this bonding. The movement of unpaired electrons between positively charged metal ions in a mesh is known as metallic bonding.

According to the electron sea model, the melting points of metals are not as extreme as the boiling points. This is because the cations and electrons are - in a metal. It does not take much energy for a solid to become liquid. But metallic bonds are very - , so it does require a lot of energy to separate atoms from the cations in their sea of electrons. This statement is true.

Therefore, the given statement is correct is true.

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The statement “the yeast engages in photosynthesis, which produces oxygen gas” is incorrect. Yeast cells do not engage in photosynthesis to produce oxygen gas.

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (a simple sugar), which serves as food for the plant.

Oxygen is also produced during photosynthesis.Yeast:Yeast is a unicellular fungus that converts sugar into carbon dioxide and alcohol. Yeast cells respire aerobically in the presence of oxygen and anaerobically in the absence of oxygen.

However, yeast cells do not perform photosynthesis. They do not have chloroplasts or pigments that are required for photosynthesis. Therefore, yeast cells cannot produce oxygen gas.Bio quizlet:Quizlet is an online learning platform that allows users to create and share flashcards, study guides, and quizzes.

It is a great resource for studying biology and other subjects. Students can create their own study materials or use existing ones created by other users. Quizlet provides an engaging and interactive way to learn and retain information.

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Volume of potassium hydroxide that can neutralise 25 cm³ of H2Z acid solution is 5cm³

The neutralization reaction is

H2Z + 2KOH → K2 H2Z + 2H2O

H2Z acid is diprotic acid as it has two ionizable hydrogens.

Thus, 1 mole of Z acid will neutralize 2 moles of KOH.

The number of moles of phosphorus acid present in 0.025 dm³ of 0.5 M aqueous solution is 0.1×

= 0.0025

They will neutralize 2×0.0025mol = 0.005 moles of KOH.

The molarity of KOH solution is 1.0 mol dm³

The volume of KOH solution required will be

1.0 × 0.005 = 0.005 dm³ = 5cm³

Hence, volume of KOH solution required will be 5 cm³.

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Answer:3

Explanation:

Answer:

no change in the temperature of the gas.

Explanation:

isothermal process of a gas, can result to compression of the gas or expansion of the gas at a constant temperature (ΔT = 0).

For isothermal gas expansion, work is done in reducing the pressure of the gas by increasing its volume at a constant temperature. The change in the internal energy of this process is zero (ΔU = 0).

For isothermal gas compression, work is done in decreasing the volume of the gas by increasing its pressure at a constant temperature. The change in the internal energy of this process is also zero (ΔU = 0).

Therefore, when a gas undergoes an isothermal process, there is no change in the temperature of the gas.

Answer:

-1 IS THE CHARGE OF ELECTRON AS THEY ARE NEGATIVE

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Answer:

Molecules of matter such as liquid, gas and solid still move even if the energy is transferred because it isn't a hundred percent. There is still energy and the time it took to transfer that said energy would have changed its state of matter.

Explanation:

Solid -the molecules are tight together. (touching)

Liquid - the molecules are close but not touching about mid way(not to far not to close)

Gas- the molecules in gasses are far apart.

It almost always goes from solid to liquid to gas. but in extreme conditions it could be different.

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The separation of the two component become more easy if the differ by at least because fractional distillation is a boiling point based separation method.

The fractional distillation is a process in which two liquid are separated from a mixture by using the difference in their boiling point as a main characteristic.

If the temperature of the two liquid for the two components is differing by at least 20 degree then fractional distillation can be accomplished more easily because it will become easier for us to separate the two components.

Because one of the component can be separated much earlier without wearing about the evaporation of the Other compound. The big difference in the boiling point makes the process of separation much easier.

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Answer:

0.4M NaOH

Explanation:

Molarity, M, is an unit of concentration widely used defined as the ratio between moles of solute (In this case, NaOH) and volume of solution in liters.

As the solution contains 2 moles of NaOH-Moles of solute- in 5L of solution, the molarity is:

2 moles NaOH /  5L =

The classification test used to differentiate an aldehyde from a ketone is the 2,4-dinitrophenylhydrazine (DNPH) test. The correct option is C.

The DNPH test is a common and reliable method for distinguishing between aldehydes and ketones. The test involves mixing a sample of the unknown compound with a solution of DNPH in acid. If the compound is an aldehyde, it will react with the DNPH to form an orange-red precipitate.

Ketones do not react with DNPH under these conditions. The DNPH test is widely used in both qualitative and quantitative analysis of organic compounds. It is a simple and effective method for identifying the presence of an aldehyde functional group in a compound. Therefore, the correct option is C.

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Dividing the number of moles of electrons by the current gives us the time in seconds. By substituting the values, we can obtain the time required to plate out 1.0 kg of aluminum from aqueous silver ions using a current of 100.0 A.

1. In the given scenario, plating out 1.0 kg of aluminum (Al) from aqueous silver ions (Ag+) with a current of 100.0 A would take a certain amount of time. The time required can be calculated using Faraday's laws of electrolysis.

2. According to Faraday's laws, the amount of substance deposited or liberated during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte. The proportionality constant is known as the Faraday constant, which is approximately equal to 96,485 coulombs per mole of electrons.

3. To calculate the time required for the plating process, we need to consider the molar mass of aluminum and the stoichiometry of the reaction. The molar mass of aluminum is approximately 27 g/mol. We can convert the given mass of aluminum into moles by dividing it by the molar mass.

1.0 kg = 1000 g

Number of moles of Al = 1000 g / 27 g/mol = 37.04 mol

4. From the balanced chemical equation, we know that for every 3 moles of electrons transferred, 2 moles of aluminum are plated out. Therefore, the number of moles of electrons required to plate out 37.04 moles of aluminum can be calculated as follows:

5. Number of moles of electrons = (37.04 mol * 3 mol of electrons) / 2 mol of Al = 55.56 mol

6. Using the relationship between charge (Q), current (I), and time (t) (Q = I * t), we can find the time required by rearranging the formula:

t = Q / I = (55.56 mol * 96,485 C/mol) / 100.0 A

Simplifying the calculation, the time required to plate out 1.0 kg of aluminum from aqueous silver ions with a current of 100.0 A can be determined.

7. To plate out 1.0 kg of aluminum (Al) from aqueous silver ions (Ag+) with a current of 100.0 A, we need to consider Faraday's laws of electrolysis. These laws state that the amount of substance deposited or liberated during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte. The Faraday constant, which is approximately 96,485 C/mol, relates the quantity of electricity (charge) to the amount of substance. By calculating the number of moles of aluminum and the moles of electrons involved in the reaction, we can determine the time required for the plating process. Dividing the number of moles of electrons by the current gives us the time in seconds. By substituting the values, we can obtain the time required to plate out 1.0 kg of aluminum from aqueous silver ions using a current of 100.0 A.

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The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) is equal to the moles of solute per litre of solution.

In this instance, the volume of the solution is 1250 mL, and the molarity of KC1 is 0.75 M. The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) times the number of litres in the solution equals 0.75 M times (1250 mL/1000 mL/L) or 0.9375 moles of KC1.

Consequently, 0.9375 moles of KC1 are present in 1250 mL of 0.75 M KC1. It is significant to remember that a solution's molarity is a measurement of the amount of a solute present in a given volume of the solution.

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Answer:

V₂ = 1.41 L

Explanation:

Given data:

Initial temperature = 35°C (35 +273.15 K = 308.15 K)

Initial volume = 1.5 L

Final temperature = 17°C (17+273.15 K = 290.15 K)

Final volume = ?

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 1.5 L × 290.15 K / 308.15 k

V₂ = 435.23 L.K / 308.15 k

V₂ = 1.41 L

Answer:

Final temperature  = 83.1 °C

Explanation:

Given data:

Mass of concrete = 25 g

Specific heat capacity = 0.210 cal/g. °C

Initial temperature = 25°C

Calories gain = 305 cal

Final temperature = ?

Solution:

Q = m. c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

305 cal = 25 g ×0.210 cal/g.°C × T2 -  25°C

305 cal = 5.25cal/°C × T2 -  25°C

305 cal / 5.25cal/°C = T2 -  25°C

58.1 °C = T2 -  25°C

T2 = 58.1 °C + 25°C

T2 = 83.1 °C

The balance chemical reaction is as below:

4Fe (s) + 3O₂ (g) ⇒ 2Fe₂O₃ (s)

The term balanced chemical equation is defined when the number of the atoms involved in the reactants side is exactly equal to the number of atoms in the products side.

The most important thing about balancing chemical equations is to satisfy the law of conservation of mass, This states that  “the total mass of the products is exactly equal to the total mass of all the reactants”

Thus, The balance chemical reaction is as below:

4Fe (s) + 3O₂ (g) ⇒ 2Fe₂O₃ (s)

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The statements which is true about the reactants from the given simulation above is: It involves the breaking of chemical bonds.

The correct answer choice is option c

For a chemical reaction to occur, the bond between the reacting substances breaks either by covalent or electrovalent bonding in order to form new substance.

So therefore, reactants usually break chemical bonds duringchemical reaction.

Complete question:

A chemical reaction causes the chemical compositions of substances to change. Reactants are substances that enter into a reaction, and products are substances produced by the reaction

Which of the following are the reactants for this simulation? Select all that apply

a. A chemical reaction results to formation of new bonds

b. A chemical reaction involves the formation of new substance.

c. It involves the breaking of chemical bonds

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In the image shown, lithium combines with fluorine to give lithium fluoride.

We know that a compound is formed when there is a combination of atoms to form a compound. There are several kinds of bonds that could be formed between the atoms in a compound. In this case, we have the ionic bond. The ionic bond is formed by the complete transfer of valence electrons from a metallic element to a nonmetallic element.

Now, we have two elements that are combining, the element by the left hand side is the metal and this metal is lithium. It combines with the non metal fluorine on the right hand side to yield Lithium fluoride.

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The number of moles of Neon gas : 1.079

Given

24.18 Liters of Neon gas at STP

Required

The number of moles

Solution

There are 2 conditions that are usually used as a reference in chemical calculations (mainly for determining the volume per mole of a gas or the molar volume), STP and RTP

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

So mol for 24.18 L :

= 24.18 : 22.4

= 1.079 moles

Answer:

A. teeth

Explanation:

It contains a protien called collagen, which absorbs chemical elements from the food that an individual eats, so scientists are able to obtain information about animals diet by studying the chemical elements found in fossilised teeth.

Answer:

Teeth

Explanation:

They can see the shape of the teeth and try to figure out what they ate

The value of  the  volume needed is  48.6 mL

Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most widely used unit to express solution concentration: liters of solution/moles of solute equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.

Moles of solution = molarity stock solution× volume stock solution

Given  that:

Moles of the solution to be made = 0.00510 mol

volume stock solution = ?

molarity stock solution = 0.105 m

so ,

0.00510 mol = 0.105 m× volume stock solution

volume stock solution = 0.00510 /0.105 L = 0.0486 L

The volume of 0.105M stock solution added = 0.0486 L

1 L = 1000 mL

So, volume needed = 48.6 mL

The complete question is : How many mL of 0.105 M AgNO3 are needed for an experiment that requires 0.00510 mol of AgNO3? How many mL of 0.105 M AgNO3 are needed for an experiment that requires 0.00510 mol of AgNO3? 17.8 mL 0.536 mL 18.70 mL 48.6 mL 20.6 mL

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An agonist drug mimics the effects of a neurotransmitter by binding to and activating its receptor, resulting in a similar physiological response.

When an externally administered drug binds to and activates a receptor, mimicking the effects of a neurotransmitter, this process is called "agonism." An agonist drug is one that binds to the receptor and activates it, producing a similar effect to the endogenous neurotransmitter. The steps involved in this process are as follows:

1. The externally administered drug, or agonist, enters the body through various routes (oral, intravenous, inhalation, etc.).
2. The agonist reaches the target site, where specific receptors for the neurotransmitter are present.
3. The agonist binds to the receptor, either by competing with the endogenous neurotransmitter or by binding to a separate site on the receptor.
4. Upon binding, the agonist activates the receptor, triggering a response similar to the one produced by the neurotransmitter.
5. The activated receptor then initiates a series of biochemical events, leading to the desired effect of the drug.

In summary, an agonist drug mimics the effects of a neurotransmitter by binding to and activating its receptor, resulting in a similar physiological response.

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